The VH6102 is a DECT cordless headset, suitable for use with all DECT-capable VTech phones, including models VSP726, VSP736, and VSP861. It operates up to 500' away from the base telephone.
Advanced noise-canceling technology blocks out distracting background noise, and the user can choose from three different wearing styles: over-the-ear, over-the-head or behind-the-neck.
For more details, see this page:
https://businessphones.vtech.com/pd/3639/VH6102-ErisTerminal-SIP-DECT-Cordless-Headset